Driving belt for use on cone pulleys and the like



July 13 1926; 1,592,416

H. E. BROWNELL DRIVING BELT FOR USE ON CONE PULLEYS AN D THE LIKE FiledApril 22, 1926 H5 1. Fi .2.

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Inventor.

Z'z/Zud J? Mam 9M 1 v E tiar zey Patented July 13,

UNITED star RICHARD, HENRY nLLrsoN BEOW'NELLIQF srocKronr, ENGLAND.

DRIVING BELT non USE on cons ruLLnYs am) rnis Linn.

Application filed'Apri1'22, 192e, seriainaioassz, and in Great Britainsamba 11. 1924..

This invention relates to that kind of leather driving belt for conepulleys and the like wherein the inner or driving surface of the belt ismade of reduced width.

Previous to my invention it is known to produce leather belts of thiskind by building them up of an outer layer and a narrower inner layer,the two layers being secured together by cement, stitching, rivets andthe like.

The object of my invention is to produce an improved form of thehereinbefore specificd kind of leather belt which will obviateseparation of the inner or driving surface from the wider outer ornon-driving surface under the stresses and strains which the belts areexposed to in use, thus increasing the durability of the belts.

I attain this object by the means illustrated in the accompanying; sheetof drawings, in which- V Figures 1, 2 and 3 show the cross-sections ofbelts according tooneconstruction bu of different cross-sectionalshapes.

Figures 4, 5 and 6 show the cross-sections of belts according to anotherconstruction but of diiferent cross-sectional shapes.

Referring to Figure 1 of the drawings, I take a piece of leather ofsuitable width and thickness and secure the ends together, for exampleby splicing, to form an endless belt. I then remove material fromtheinner side 1 of the belt, for exampleby cutting so as to form anendless rebate 2 at'each edge 3thereof. The inner or drivingsurface 1 ofthe belt is thereby reduced in width and is thus narrower than the outersurface 4, the cross section of the belt having the appearance of ashorter rectangular superposed on a longer rectangle, the tworectangular sections being however integral with each other. Thus thebelt is composed of a single piece of material and there are thereforeno attached layers to become separated when the belt is in use.

It is to be understood that the belt may be built up of two or morelengths spliced together end to end to form one continuous belt. I

In lieu of rebating the belt, the same may be chamfered on its innerside 1 either with a flat chamfer 5, as illustrated in Figure 2 or witha concave chamfer 6, as illustrated in Figure 3, to produce a drivingsurface 1. at

less width than the of the outer surface d belt.

In the construction illustrated in Figures d to 6 I fornithe belt of anouter layer 7 orleather and an inner layer 8 leather, these layers beingforenample each about 'lialf the thickness 'of the finished belt. The

inner layer 8, which may forexample be of ordinary leather has rebates 9formed, for example by cutting at its inner or driving side 10 along itstwo edges 11, as illustrated in Figure a, or has the said edgeschamfered, for ex'ampl by cutting with a straight chanifer 12, asillustrated in Figure 5, or

'with a concave chainfer 13, as illustrated in- Figure; 6, thus reducingts driving surface The two edges 11 are thus rei0 in width. duced. to acomparatively small thickness The outer layer 7, whichfor example may beof chrome leather and is of the same thickness as the centre part of theinner layer 8, is attached to the outer surface of the 1111181 layer 8by means of cement, and/or rivets, stitching or the like. Owing to thecomparatively small thickness of the outer edges 11 of the innerlayer'S, the edgesll present comparatively little resistance to thebending and compressing action exerted on them by the outer layer 7Therefore the cement or the like attaching them to the outer layer 7 isnot unduly strained and is sufficiently strong toprevent the edges 11frombreaking loose or separating from the outer layer. The cement or thelike between the centre or thicker portion of the inner layer 8 and theouter layer 7 is sufficicntly strong to prevent separation ofthe thickerpart" of 8 from the outer layer 7 when assistedby the unbroken connection of the outer layer 7 with the thinner parts or edgesll of theinnerllayer 8.

I claim 1. A leather drivingibelt comprising two layers of initiallyequal width secured together to form a back portion and a front portionwhich is of less width than the said back portion and has a drivingsurface, the said front portion being provided on and formed integralwith one of the said'two layers.

2. A leather drivingbelt composed of a strip of leather having portionsof the leather removed at thesides of the strip to reduce the width ofthe driving surface relative to the'bac-k of the belt and a strip ofleather equal in width and secured to the back of the belt.

3. In a leather driving belt for use on cone pulleys, an endless band ofleather, parallel rebates formed at the edges and driving side of theband by removal of leather therefrom and a second endless hand ofleather of the same Width as the first named band and secured to thenon-driving side of the first named band.

In testimony whereof, I have signed my name to this specification atManchester, in the county of Lancaster, England, this 12th day of April,1926.

RICHARD HENRY ELLlSGN BROWNELL.

